Baby chicks began hatching in an incubator in Jill Macolini's second-grade classroom on April 1. "If you pet a chick softly with one hand, it'll calm them down," said Acadia Alves.

The baby chick is hidden among them in plain sight, and one needs to spot it quickly. Take a look at the viral brain teaser below: Since being shared two days ago on Facebook, the brain teaser has ...